To keep pace with the market, the needs of the majority of users and make the best use of time, we have decided to end STB development for the older simulator products, including:
Prepar3D V4.0 through V4.3;
Microsoft Flight Simulator X (in all forms including Steam Edition);
If one of these is your simulator, you can continue to enjoy and use STB as it stands today and we recommend you install the latest updates relevent to each version. STB will continue to be available for purchase on the older platforms, however I won't be making any more changes to the software, addressing defects and support will be limited to know issues. That said, I may still publish content updates (for example airline logos and flight codes) as the various AI packages available continue to evolve.
Prepar3D V4.4 is our fully supported platform for STB, and I expect resolution of bugs and new feature introduction to be focussed here.